Allen-Bradley 1794-OB8 Flex I/O Digital DC Output Module 8-Channel By wayne No Comments on Allen-Bradley 1794-OB8 Flex I/O Digital DC Output Module 8-Channel 2 Min Read Buy the Allen-Bradley 1794-OB8 Flex I/O digital DC output module with 8 sourcing channels. It delivers 500mA per channel at 24V DC with fast switching.